Oil-vapor baffle box



March 18 1924. 1,487,585

- T. M. MCKELVY ,OIL' VAPOR BAFFLE BOX Filed April 10 1922 2 Sheets-Sheet l TMMAZZI/y March 18 1924.

T. M. M KELVY OIL VAPOR BAFFLE BOX Filed April 10 1922 2 Sheets-Sheet 2 (1H0: we H Patented Mar. 18, 1924.

THOMAS M. MCKELVY, OF FRESNO, CALIFORNIA.

OIL-VAPOR BAIFFLE BOX Application filed April 10, 1922.

To all whom it mag concern.

Be itknown that I, THOMAS M. Mo KELVY, a citizen of theUnited States, residing at Fresno, in the county of Fresno and State of California, have invented certain new and useful Improvements in Oil-' may be conveyed from the crank case of an engine to the carburetor without oil vapor for the purpose of mixing-with the fuel and to enter the explosive chambers to be compressed and ignited and thereby render a saving in'fuel and providing a scavenging medium to the crank case.

Another object of this invention is the provision of an oil vapor bafile box of the above stated character 'which will be sim )le, du'rable'and eflicient, and-which may e manufactured and sold at a comparatively low cost. \Tith these and other objects in view, as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination and arrangement of parts as will be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying draw ings, in which:

Figure 1 is a side elevation,illustrating an engine with my invention applied thereto,

Figure 2 is a front elevation, illustrat ing the box located in the priming gear chamber of an engine,

Figure 3 is a sectional View, illustrating the. box,

Figure 4 is a sectional view, taken on the line 44 of Figure 2.

Referring in detail to the drawings, the numeral 1 indicates an internal combustion engine equipped with an intake manifold 2 having a carburetor 3. The engine 1 is provided with the usual crank case 4 and timing gear chamber 5 in communi- Serial No. 551,430.

cation with the crank case 4 and closed by a removable wall 6. The foregoing description relates to a well known construction of engine to which my invention is applied and the rear wall 7 of the chain ber-5 has formed therein a conduit or passage 8, one end -of whichopens outwardly through one side of the cylinder block of the engine 1 and has connected thereto a pipe 9 which is in turn connected to the air intake of the carburetor 3, while the other end of said conduit or passage 8 opens outwardly through the wall 7- into the chamber 5. Between the last named end of the conduit '8 and the crank case l of the engine is an oil deflector 10 comprising a curved plate 11 which has its upper edge detachably secured to the wall 7 above the conduit 8 by abolt 12, while the lower portion ofsaid plate extends in parallelism with the cover 6 and in close proximity thereto. Bolts 13 also secure the plate 11 to the wall 7 below the conduit 8 and supports a screen 14: through which the gases leaving the crank case and entering the carburetor must pass and as the gases leave the crank case. they contain a certain amount of oil vapor which is removed from the gases when the latter pass through the screen and the oil vapor accumulates on the screen and falls by gravity back into the crank case, thus retaining the lubricant within the crank case and obviating the passage of the same into the carburetor. The screen 14: comprises a skeleton frame 15 of triangular shape in cross section which has its apex disposed lowermost with its side portions mounted on the bolts 18. The sides and ends of the frame are covered with foraminous material 16 for. the purpose of forming a screen. The gases, after passing through the screen, are directed into the conduit 8 by the curved portion of the plate'll and prevented from passing into the upper end of the chamber 5. p

From the foregoing description taken in connection with the accompanying drawings, it should be apparent that a device is provided which can be. easily and conveniently installed on. an internal combustion engine so that the gases accumulatin within the crank case of the engine may e conveyed to the carburetor for mixing with the fresh fuel without any liability of oil fere with the proper fuel entering the engine or explosive chambers thereof and also preventa Waste of the lubricant as would be the case if the oil vapor were permitted to escape from the crank case, and further the device provides a very effective scavenging medium to the crank case whereby the gases escaping by the piston of the engine into the crank case may be again utilized for fuel by entering the carburetor and becoming mlxed with fresh fuel, consequently providing a saving of fuel in the operation of the engine.

While I have shown and described the preferred embodiment of my invention, it will-be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and Scope of the invention as claimed.

Having thus described my invention what I claim is: v

1. In combination with a chamber having a passageway in communication with the fuel line of an internal combustion engine and open at one side thereof, an oil trap means consisting of a screen disposed in the path of travel of oil vapor'to said passageway, a deflector plate extending upwardly from the screen adjacent one side thereof and overthe screen and terminating adjacent the' plane of the other side of and above the screen to deflect material to said passageway.

2. In combination with a chamber having a passageway in communication with the fuel line of an internal combustion engine and open at one side thereof, an oii trap means consisting of a screen disposed in the path of travel of oil vapor to said passageway, a deflector plate extending upwardly from the. screen adjacent one side thereof and over the screen and terminating adjacent the plane of the other side of and above the screen to deflect material to said passageway, and fastening means extending through the deflector and'screen into the chamber and'adjacent the base of said passageway. I

3-. i\n oil trap means consisting of a screen disposable in the path of travel of oil vapor and being substantially V-- shape in cross section and with its apex lowermost, a deflector plate extending upwardly over one side f the screen and then above and over the top of said screen, the upper edge of the plate tern'iinating above and in spaced relation to the screen and constituting a fastening flange, and a fastening bolt passing through the deflector plate and screen to secure them together and to a support.

In testimony whereof I affix my signature in presenc to two witnesses.

THOMAS'M. MoKEL-VY. Witnesses:

A. D. JACK, FRANCES L., BLAIR. 

